Mahle OE Plain Ring Set is a top-ring kit specified for a 4.605-inch bore diameter with 1/16-inch ring thickness, listed under PC479. These plain top rings are intended for use where matched piston ring dimensions are required, providing the top sealing ring set sized to engines with a 4.605-inch cylinder bore.
Mahle Rings 4.605in Bore Dia 1/16in PC479 Top Rings Plain Ring Set